IntelFrameworkModulePkg BdsLib: Fix potential memory leak when calling BdsLibGetVariableAndSize

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ruiyu Ni<ruiyu.ni@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15732 6f19259b-4bc3-4df7-8a09-765794883524

IntelFrameworkModulePkg/Library/GenericBdsLib/BdsBoot.c

@@ -3570,6 +3570,8 @@ BdsLibBootNext (
     ASSERT (BootOption != NULL);
     BdsLibConnectDevicePath (BootOption->DevicePath);
     BdsLibBootViaBootOption (BootOption, BootOption->DevicePath, &ExitDataSize, &ExitData);
+    FreePool(BootOption);
+    FreePool(BootNext);
   }
 
 }